Deliver.db error: DBERROR db4:

[Rafael Alcalde]

I have found a lot of problems with all the databases from cyrus: 
deliver.db, etc.

In /var/log/maillog we see:
 DBERROR db4: Logging region out of memory; you may need to increase its 
size

Aug  6 11:18:42 mail1 lmtpunix[27875]: DBERROR: opening 
/var/lib/imap/deliver.db: Cannot allocate memory


The only solution I have found right now to restore the system is:

/etc/init.d/cyrus-imapd stop
/etc/init.d/postfix  stop
mv /var/lib/imap/deliver.db /var/lib/imap/deliver.db_old
mv /var/lib/imap/tls_sessions.db /var/lib/imap/tls_sessions.db_old
mv /var/lib/imap/db/* /var/lib/imap/db/temp
postsuper -s
/etc/init.d/cyrus-imapd start
/etc/init.d/postfix  start
postsuper -r ALL

But this only fix the problem temporaly... Can you help me?